<div dir="ltr"><div>Hello Igor,</div><div><br></div><div>Can you please explain what settings you have used in the field calculator dialog. A screenshot would be helpful.<br></div><div><br></div><div></div><div><div>Alexandre Neto</div><div><span style="color:rgb(102,102,102)">User Support</span></div><div><a href="mailto:alexandre.neto@qcooperative.net" target="_blank">alexandre.neto@qcooperative.net</a></div><div><a href="http://www.qcooperative.net" target="_blank">www.qcooperative.net</a></div><div><a href="http://www.qcooperative.net" target="_blank"><img alt="www.qcooperative.net" src="https://ci3.googleusercontent.com/mail-sig/AIorK4yIML-DGf_iQYdOD7cEI8ehzPzWHknd3AObzSJPTu7tQ0YpH1n1pPaNZgUoNGB0RQtwCaD63UE" width="200" height="75"></a></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Igor Oliveira Ribeiro via QGIS-User <<a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a>> escreveu no dia segunda, 30/01/2023 à(s) 13:14:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small">Hi community, </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small">I need your help. I'm using QGIS 3.10.11 with Grass 7.8.4. I'm building a QGIS modeler and I want to calculate the area of an input polygon.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small">So, my input polygon is a vector feature. I tried using a field calculator ($area) and Advanced Python Field Calculator (Field "Formula", I used "value = $geom.area() ).</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small">However, nothing is working. When I run the modeler, there is no error message. But, I'dont have the area calculated either.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small"><br></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:small">Thanks for your help.</div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span><br><div dir="ltr" style="margin-left:0pt" align="left"><table style="border:medium none;border-collapse:collapse"><colgroup><col width="168"><col width="456"></colgroup><tbody><tr style="height:21pt"><td colspan="2" style="vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><a href="https://doi.org/10.1016/j.envpol.2020.114029" target="_blank"><span style="font-size:8pt;font-family:Arial;color:rgb(39,78,19);font-weight:700;font-style:italic;vertical-align:baseline;white-space:pre-wrap">See our last paper: </span></a></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><a href="https://doi.org/10.1016/j.envpol.2020.114029" target="_blank"><span style="font-size:8pt;font-family:Arial;color:rgb(0,0,0);font-style:italic;vertical-align:baseline;white-space:pre-wrap">Impact of biomass burning on a metropolitan area in the Amazon during the 2015 El Niño: The enhancement of carbon monoxide and levoglucosan concentrations.</span></a></p></td></tr><tr style="height:128.697pt"><td style="border-right:3pt solid rgb(56,118,29);vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><span style="border:medium none;display:inline-block;overflow:hidden;width:146px;height:145px"><img src="https://lh5.googleusercontent.com/-bliIGlTBH64UHBAAns8Ubhxgih0cgNVZjNAWPkBZSkYIa-o9idb3Km_x571oZ3NL0nZVMvFmclRedyzJDfv00BMdZPjcKg4zD1y1yGGErKoPszFJuTRjvN_0fmLsa4Ah_2YTtxJ" style="margin-left: 0px; margin-top: 0px;" width="146" height="145"></span></span></p></td><td style="border-left:3pt solid rgb(56,118,29);vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:12pt;font-family:Georgia;color:rgb(56,118,29);background-color:transparent;font-weight:700;vertical-align:baseline;white-space:pre-wrap">Igor Oliveira Ribeiro</span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:8pt;font-family:Georgia;color:rgb(0,0,0);font-style:italic;vertical-align:baseline;white-space:pre-wrap">Post-Doc on Regional Climate Change, Vulnerability, Impacts and Adaptation - Cuomo Foundation/UEA</span></p><br><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:8pt;font-family:Georgia;color:rgb(34,34,34);vertical-align:baseline;white-space:pre-wrap">+55 92 98103 7136 | skype: igorflorestal</span></p><br><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:8pt;font-family:Georgia;color:rgb(34,34,34);vertical-align:baseline;white-space:pre-wrap">Universidade do Estado do Amazonas | Instituto Nacional de Pesquisas da Amazônia</span></p><br><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:8pt;font-family:Georgia;color:rgb(34,34,34);vertical-align:baseline;white-space:pre-wrap">Visite: </span><a href="http://www.geoescrita.com.br" target="_blank"><span style="font-size:8pt;font-family:Georgia;color:rgb(56,118,29);vertical-align:baseline;white-space:pre-wrap">www.geoescrita.com.br</span></a></p><br><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><a href="https://www.linkedin.com/in/igoroliveiraribeiro/" target="_blank"><span style="font-size:8pt;font-family:Georgia;color:rgb(17,85,204);vertical-align:baseline;white-space:pre-wrap"><span style="border:medium none;display:inline-block;overflow:hidden;width:27px;height:27px"><img src="https://lh4.googleusercontent.com/2py0KXy5JccNXFC-38-2TT9wnYCQAXMRBlM5H0eOS83jy2Sz-PUr9_1C57srnad478ma9o9_fAYHjUhFN7Hza3OOCSiFHFpboznBl1PpVLavbfnjGYoU1usFc0W8j9pS4VzAKwCV" style="margin-left: 0px; margin-top: 0px;" width="27" height="27"></span></span></a><a href="https://www.instagram.com/geoescrita/" target="_blank"><span style="font-size:8pt;font-family:Georgia;color:rgb(17,85,204);vertical-align:baseline;white-space:pre-wrap"><span style="border:medium none;display:inline-block;overflow:hidden;width:27px;height:27px"><img src="https://lh4.googleusercontent.com/-FUMJ4HbrYAwwTKB49CF6r39wVYnoWf1AD9ZLKvD6Z1Cu1yqyo8NRk-InWHOa34J87OHDcJcCstkC_khG2_jCc6qDGop64cV2F0OL-IZ1S3Jgf9SfxVF08U9xfx47ov24InhjsqE" style="margin-left: 0px; margin-top: 0px;" width="27" height="27"></span></span></a><a href="https://www.researchgate.net/profile/Igor_Oliveira_Ribeiro" target="_blank"><span style="font-size:8pt;font-family:Georgia;color:rgb(17,85,204);vertical-align:baseline;white-space:pre-wrap"><span style="border:medium none;display:inline-block;overflow:hidden;width:27px;height:27px"><img src="https://lh6.googleusercontent.com/ert1Bk_3idA2Vb4MK8Hd3B1p2vdcL52JrOmNjaGhhbS7caCNQiZwRKKX55B9pB7-3j2nPFttXJezhSxrHQeBpnEnpeD_CRjzBQgPo5hG5C68qhY1wRFMu0PDv9LbQ8iY8-K4bwIk" style="margin-left: 0px; margin-top: 0px;" width="27" height="27"></span></span></a><a href="http://lattes.cnpq.br/3909691804095045" target="_blank"><span style="font-size:8pt;font-family:Georgia;color:rgb(17,85,204);vertical-align:baseline;white-space:pre-wrap"><span style="border:medium none;display:inline-block;overflow:hidden;width:27px;height:27px"><img src="https://lh6.googleusercontent.com/z9emf1sj2DW-tYYJZ6Qkd3RxvB23DjQdH7bLcTDIv9zyi-XnZRAroZBc8OPJqQkDIvZJBpd7GCa-2ClAT2gT3ubJ4yZj1BA0-T8hGgBboms-kjpowUuhBQO4z4EcWDwF9w25FGiy" style="margin-left: 0px; margin-top: 0px;" width="27" height="27"></span></span></a><a href="https://orcid.org/0000-0002-3529-0525" target="_blank"><span style="font-size:8pt;font-family:Georgia;color:rgb(17,85,204);vertical-align:baseline;white-space:pre-wrap"><span style="border:medium none;display:inline-block;overflow:hidden;width:27px;height:27px"><img src="https://lh4.googleusercontent.com/fOmYAxdij-Q_UFG3dFFnhy_zegLQSPZcgxSE-l8u9XuSz6LvnUGItsmoPZL_GCcfoYF2yl9dqYGs3842AcozPLqY103OWAe1x-js_lNLXym1Wcde7j4r19_vICiJXP5xaE_-KPIL" style="margin-left: 0px; margin-top: 0px;" width="27" height="27"></span></span></a><a href="https://www.geoescrita.com.br/" target="_blank"><span style="font-size:8pt;font-family:Georgia;color:rgb(17,85,204);vertical-align:baseline;white-space:pre-wrap"><span style="border:medium none;display:inline-block;overflow:hidden;width:27px;height:27px"><img src="https://lh3.googleusercontent.com/H041znsV0LChyhfdBIDwXHwIh5BUG2TCmQYBSI1d4eF1NX80_T79MtdQqif3DHpBIDgzvXhuXDLc0l77eylJCPuW7jbalTIbVqBg-dm8S-JHOxZh458R0UX8SsJINhcqw7nG7_Pw" style="margin-left: 0px; margin-top: 0px;" width="27" height="27"></span></span></a></p></td></tr><tr style="height:21pt"><td colspan="2" style="vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:8pt;font-family:Georgia;color:rgb(39,78,19);font-style:italic;vertical-align:baseline;white-space:pre-wrap">Think globally, act locally!</span></p></td></tr></tbody></table></div></span></div><div></div></div></div></div></div></div></div></div></div></div></div></div>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr"><div dir="ltr"><div>Alexandre Neto</div><div><span style="color:rgb(102,102,102)">User Support</span></div><div><a href="mailto:alexandre.neto@qcooperative.net" target="_blank">alexandre.neto@qcooperative.net</a></div><div><a href="http://www.qcooperative.net" target="_blank">www.qcooperative.net</a></div><div><a href="http://www.qcooperative.net" target="_blank"><img alt="www.qcooperative.net" src="https://ci3.googleusercontent.com/mail-sig/AIorK4yIML-DGf_iQYdOD7cEI8ehzPzWHknd3AObzSJPTu7tQ0YpH1n1pPaNZgUoNGB0RQtwCaD63UE" width="200" height="75"></a></div></div></div>